package com.java110.common.api;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.node.ObjectNode;
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import org.activiti.editor.constants.ModelDataJsonConstants;
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import org.activiti.engine.ActivitiException;
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import org.activiti.engine.RepositoryService;
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import org.activiti.engine.repository.Model;
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import org.apache.batik.transcoder.TranscoderInput;
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import org.apache.batik.transcoder.TranscoderOutput;
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import org.apache.batik.transcoder.image.PNGTranscoder;
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import org.apache.commons.io.IOUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.http.HttpStatus;
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import org.springframework.web.bind.annotation.*;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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/**
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* @author luobaimang
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* @date 2019/11/28
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*/
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@RestController
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@RequestMapping("service")
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public class ModelRestController implements ModelDataJsonConstants {
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protected static final Logger LOGGER = LoggerFactory.getLogger(ModelRestController.class);
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@Autowired
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private RepositoryService repositoryService;
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@Autowired
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private ObjectMapper objectMapper;
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/**
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* 更新流程
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*
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* @param modelId 模型ID
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* @param name 流程模型名称
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* @param description
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* @param json_xml 流程文件
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* @param svg_xml 图片
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*/
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@RequestMapping(value = "/model/{modelId}/save", method = RequestMethod.PUT)
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@ResponseStatus(value = HttpStatus.OK)
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public void saveModel(@PathVariable String modelId
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, String name, String description
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, String json_xml, String svg_xml) {
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try {
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Model model = repositoryService.getModel(modelId);
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ObjectNode modelJson = (ObjectNode) objectMapper.readTree(model.getMetaInfo());
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modelJson.put(MODEL_NAME, name);
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modelJson.put(MODEL_DESCRIPTION, description);
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modelJson.put(ModelDataJsonConstants.MODEL_REVISION, model.getVersion() + 1);
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model.setMetaInfo(modelJson.toString());
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model.setName(name);
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repositoryService.saveModel(model);
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repositoryService.addModelEditorSource(model.getId(), json_xml.getBytes("utf-8"));
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InputStream svgStream = new ByteArrayInputStream(svg_xml.getBytes("utf-8"));
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TranscoderInput input = new TranscoderInput(svgStream);
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PNGTranscoder transcoder = new PNGTranscoder();
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// Setup output
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ByteArrayOutputStream outStream = new ByteArrayOutputStream();
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TranscoderOutput output = new TranscoderOutput(outStream);
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// Do the transformation
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transcoder.transcode(input, output);
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final byte[] result = outStream.toByteArray();
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repositoryService.addModelEditorSourceExtra(model.getId(), result);
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outStream.close();
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} catch (Exception e) {
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LOGGER.error("Error saving model", e);
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throw new ActivitiException("Error saving model", e);
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}
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}
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/**
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* 获取model的节点信息，编辑器根据返回的json进行绘图
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*
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* @param modelId
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* @return
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*/
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@SuppressWarnings("deprecation")
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@RequestMapping(value = "/model/{modelId}/json", method = RequestMethod.GET, produces = "application/json")
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public ObjectNode getEditorJson(@PathVariable String modelId) {
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ObjectNode modelNode = null;
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Model model = repositoryService.getModel(modelId);
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if (model != null) {
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try {
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if (StringUtils.isNotEmpty(model.getMetaInfo())) {
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modelNode = (ObjectNode) objectMapper.readTree(model.getMetaInfo());
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} else {
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modelNode = objectMapper.createObjectNode();
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modelNode.put(MODEL_NAME, model.getName());
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}
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modelNode.put(MODEL_ID, model.getId());
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ObjectNode editorJsonNode = (ObjectNode) objectMapper.readTree(
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new String(repositoryService.getModelEditorSource(model.getId()), "utf-8"));
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modelNode.put("model", editorJsonNode);
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} catch (Exception e) {
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LOGGER.error("Error creating model JSON", e);
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throw new ActivitiException("Error creating model JSON", e);
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}
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}
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return modelNode;
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}
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/**
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* 获取编辑器组件及配置项信息
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* 获取流程json文件
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*
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* @return
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*/
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@RequestMapping(value = "/editor/stencilset", method = RequestMethod.GET, produces = "application/json;charset=utf-8")
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@ResponseBody
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public String getStencilset() {
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InputStream stencilsetStream = this.getClass().getClassLoader().getResourceAsStream("stencilset.json");
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try {
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return IOUtils.toString(stencilsetStream, "utf-8");
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} catch (Exception e) {
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throw new ActivitiException("Error while loading stencil set", e);
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}
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}
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}
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